<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			.red{
				color: red;
			}
			.bigFont{
				font-size: 50px;
			}
			.underline{
				text-decoration: underline;
			}
		</style>
	</head>
	<body>
		<p class="red bigFont">段落1</p>
		<p class="underline red">段落2</p>
		<p class="underline bigFont">段落3</p>
		<p class="red bigFont underline">段落4</p>
	</body>
</html>
